Deep Purple (Double-Flowered Black Dragon) Wisteria is a deciduous climbing vine with strong twining growth. It is a vigorous climber that requires a sturdy trellis for support, making it suitable for pergola greenery or vertical landscaping in gardens. The flowers are deep purple or black-purple, double-flowered, and hang in dense clusters, with flower spikes approximately 30 to 80 cm long and a strong fragrance. The flowering period of this variety is concentrated from April to May.